Citation

Levinson H. Transp. Res. Circular 2000; (E C019): 13 p..

Copyright

(Copyright © 2000, U.S. National Academy of Sciences Transportation Research Board)

DOI

unavailable

PMID

unavailable

Abstract

This paper develops a method for predicting the safety of arterial roads based on arterial traffic volumes, access road (i.e., driveways and intersecting streets) volumes, and access density. This procedure applies the long-established relationship between intersection accidents and the product of conflicting traffic volumes. The simplifying assumption that access roads have roughly equivalent volumes makes it possible to provide safety indices that relate only to the change in access density; these indices are generally consistent with those reported in NCHRP Report 420, "Impacts of Access Management Techniques." They show that the increase in accidents is equal to the square root of the increase in access density.